The purpose of this study is to delineate the effects of preoperative oral carbohydrate on immediate postoperative insulin resistance (PIR) in patients undergoing elective open colorectal cancer resection, and to further clarify the hypotheses that preoperative oral carbohydrate treatment attenuates PIR in patients by enhancing insulin signaling to PI3K-dependent pathway.

Preoperative general well-beings and the insulin resistance before and immediately after surgery assessed with the visual analogue scale (VAS) and the homeostasis model assessment (HOMA) respectively [ Time Frame: Perioperative period ] [ Designated as safety issue: Yes ]

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Please refer to this study by its ClinicalTrials.gov identifier: NCT00755729